|Publication number||US7849885 B2|
|Application number||US 10/535,362|
|Publication date||Dec 14, 2010|
|Filing date||Oct 27, 2003|
|Priority date||Nov 18, 2002|
|Also published as||CN1711439A, CN100387888C, DE60316979D1, DE60316979T2, EP1563215A1, EP1563215B1, US20060151040, WO2004046601A1|
|Publication number||10535362, 535362, PCT/2003/12073, PCT/EP/2003/012073, PCT/EP/2003/12073, PCT/EP/3/012073, PCT/EP/3/12073, PCT/EP2003/012073, PCT/EP2003/12073, PCT/EP2003012073, PCT/EP200312073, PCT/EP3/012073, PCT/EP3/12073, PCT/EP3012073, PCT/EP312073, US 7849885 B2, US 7849885B2, US-B2-7849885, US7849885 B2, US7849885B2|
|Inventors||Soren B. Olsen, Carsten Post|
|Original Assignee||Norsk Hydro Asa|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (13), Referenced by (8), Classifications (12), Legal Events (3)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This application claims the benefit of International Application No. PCT/EP2003/012073 FILED Oct. 27, 2003, having a priority claim to Norwegian patent application number 20025537 filed Nov. 18, 2002.
The invention relates to a hoselike member having an external wall composed of a number of metal wires, or tubes.
Such hoselike members are generally known and are used as protective hose for guiding longitudinal objects, such as electrical cables, fluid lines, etc., especially in cars. The walls of these hoselike members are generally composed of metal wires that are woven, usually round woven, so as to form a generally continuous surface.
These known hoselike members fulfill these functions in a satisfactory way. Nevertheless, there is need for similar members with lightweight constructions and for use in other applications.
It is, therefore, an objective of the invention to provide such a hoselike member.
This objective is achieved by ensuring that all the wires or tubes are parallel to each other and by ensuring that the wires or tubes are wound in a helical manner around the axis of the hoselike member.
In this way, a very effective and cheap method of producing hoselike members can be obtained.
Preferably, the metal is aluminium or an aluminium alloy.
By using this type of metal, which is lightweight and easy to bend, it is even possible to obtain a convenient way of producing the hoselike member.
Otherwise, and especially when using tubes, the hoselike member can be used as a flexible connection in a fluid transportation system.
Until now, it has been common to use rubber hoses for these applications, and, if provided with steel filaments, they were even capable of containing high pressures, e.g. for use in hydraulic systems. The property making the rubber hoses well suited to this purpose is their high degree of flexibility, whereby the hoses can connect fixed parts with moving parts. The hoses are also durable, even when subject to vibration. As such, they have frequently been used in automotive systems, in which two components, each having their own vibrating system, need to be connected by a fluid line, and where a certain degree of flexibility is required. Examples of such applications are air-conditioning systems, fuel supply systems, brake lines, etc.
As a material, however, rubber suffers from the drawback that at least some fluid, in gas form, may diffuse through the material. In vehicle braking systems, water enters into the brake fluid by diffusion through the flexible rubber hose connections. In air-conditioning systems, especially those based upon carbon dioxide, the carbon dioxide slowly escapes through the rubber hoses, resulting in poor performance of the systems, and time-consuming and costly refilling is necessary. A further disadvantage of rubber is aging, which normally occurs in all outdoor conditions. As a result thereof, rubber moulders away and needs replacement at time-intervals dependent upon its application. Moreover, the tensile strength of rubber is relatively low, and does not make it very suitable for high-pressure applications.
It is, therefore, an aim of the invention to provide a hoselike member having a circumference formed by a number of metal tubes, where all the tubes are substantially parallel to each other and are wound in a helical manner around the longitudinal axis of the hoselike member.
Other characteristics and advantages of the invention will become clear from the following descriptions, which refer to the annexed drawings:
The wires or tubes making up the hoselike members are preferably made of aluminium or aluminium alloys, which offer good deformability, flexibility and durability—useful features for the production and the application of the hoselike member.
In cases where the central part is hollow, the hoselike member can be used as a protective guide for sensitive longitudinal elements, such as electrical cables, flexible hoses, etc. This is a preferred application in automotive vehicles, but it may also be used in other situations. In such applications, each end portion of the hoselike member (1) may be covered in order to protect the ends of the wires or tubes (not shown). When this protection is required, a closed surface may be preferred, but in a number of applications, it is only the guidance that is important so that a semi-open surface can be used.
In such applications, the elements making up the hoselike member may be either wires or tubes, and, where necessary, the hoselike member may be longitudinally preformed so as to provide the required guiding of the longitudinal elements.
In other applications the hoselike member is intended to be used as a flexible fluid connection between two rigid fluid lines, or implements. In this type of application, the hoselike members must be made out of wound or twisted tubes.
FIG. (12) shows a hoselike member (1) comprising manifolds (4) and a spiral section (14) and a straight section (16). This design is well suited for applications requiring very high flexibility. Of course, the hoselike member may comprise further spiral and/or straight sections.
The hoselike member (1) may be used in high pressure systems carrying gas, air, water, steam, petrochemicals or any other substance in order to allow individual movement of the equipment and the connecting lines. The member (1) may also be used in braking systems on vehicles and other means of transport. In these types of applications it may be used with or without a core carrier.
The degree of flexibility of a tube system is, according to the invention, defined by a number of characteristics of the tubes to be used.
For a tube of a given material, the compliance perpendicular to the longitudinal direction is dependent upon the diameter of the tube, and the wall thickness.
Otherwise, the burst pressure (BP) of a tube of a defined material is dependent upon the diameter. In
In order to make a flexible system, having sufficient compliance, sufficient mechanical strength, especially resistance to internal pressure, and the lowest possible pressure drop it is important to use tubes with a diameter and a wall thickness that provide a compromise between those requirements.
Tests have shown that the most adequate tubes will have an internal diameter between 1 and 6 mm and a wall thickness between 0.1 and 0.5 mm.
Preferably the internal diameter is between 2 and 4 mm, whereas the wall thickness is close to between 0.2 and 0.4 mm.
Otherwise, it has been found that the degree of flexibility or compliance is dependent upon the pitch angle V, i.e. the angle between the helical wound tube and the longitudinal axis of the pipe system (see
The construction of this connecting piece is almost identical to the one described in EP-B-0 895 051.
It is to be understood that the invention as disclosed in the description and in the figures may be modified and changed and still be within the scope of the invention as claimed hereinafter.
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|U.S. Classification||138/115, 138/116, 138/117, 138/109|
|International Classification||F16L11/22, F16L11/08, F16L11/00|
|Cooperative Classification||F16L11/22, Y10T428/1393, F16L11/081|
|European Classification||F16L11/08D, F16L11/22|
|Feb 22, 2006||AS||Assignment|
Owner name: NORSK HYDRO ASA, NORWAY
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:OLSEN, SOREN B.;POST, CARSTEN;REEL/FRAME:017201/0004
Effective date: 20050531
|Jun 5, 2014||FPAY||Fee payment|
Year of fee payment: 4
|Oct 1, 2014||AS||Assignment|
Owner name: SAPA AS, NORWAY
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NORSK HYDRO ASA;REEL/FRAME:033864/0635
Effective date: 20140828